Why US wanted Iwo.
-Departure point for B-29 assaults into mainland JP.
-INTRODUCE ONLY the idea that this operation might have been too costly. We'll ask "was it worth it?" later on...
Why JP wanted Iwo.
-Address Chi Chi Jima didn't have conducive terrain for airfields.
-CSSA Logistics pushed out of Chi Chi to Iwo.
-HQ at Honolulu failed to share lessons learned from previous amphibious assaults with commanders at Guam.
-Assumption that Iwo's EN force dispo was small.
-Submarines circled the island taking periscope pictures.
-Aerial recon photos.